13. During the past, city dwellers who have visited the
province of Benguet would always talk about what they
consider as "fresh air" in the said mountain province.
From this, one can infer that
a. higher altitudes would have more oxygen.
b. less people compete for air that is beneficial to our
blood.
c. the quality of the respiratory system has effects on our
own health.
d. there are people who equate cold climate with fresh
air.
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Answer:
D. There are people who equate cold climate with fresh air.